package src;

import javax.swing.*; ...

public class sfsf {
    /**
     *
     * @param args
     */

    public static void main(String[] args) {
        System.out.println("Hello World");
        JFrame frame = new JFrame();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(500, 500);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
        JButton button = new JButton("Click Me");
    }

}
